I've tried starting rr3 and immediately closing it, and then going airplane mode and changing the date. This works to unlock cars (how I was able to buy the ferrari 50s car early), but it won't let me enter challenges - it says connect to the internet. If I connect to the internet, the game recognizes the true date and won't let me enter the event. As I've found out, I don't even need to open the app first, i can just use airplane mode and hcange the date and then start the rr3.
Here's the other problem: I seem to be taken to the same date in the future - a date before January 26 where I'd be able to buy the f1 cars.
So here's my question: how do I either - get into a challenge in the future date, or go into the future enough to be able to buy the f1 cars?